Chapter 3 Hardware OverviewNational Instruments Corporation3-7AT-MIO/AI E Series User Manualprogrammed on a per channel basis for multimode scanning. Forexample, you can configure the circuitry to scan 12 channels—fourdifferentially configured channels and eight single-ended channels.Table 3-1 describes the three input configurations.For more information about the three types of input configuration, referto the Analog Input Signal Connections section in Chapter 4, SignalConnections, which contains diagrams showing the signal paths for thethree configurations.Input Polarity and Input Range♦ AT-MIO-16E-1, AT-MIO-16E-2, AT-MIO-64E-3,AT-MIO-16E-10, and AT-MIO-16DE-10These boards have two input polarities—unipolar and bipolar.Unipolar input means that the input voltage range is between 0 andV ref , where V ref is a positive reference voltage. Bipolar inputmeans that the input voltage range is between -V ref /2 and+V ref /2. The AT-MIO-16E-1, AT-MIO-16E-2, AT-MIO-64E-3,AT-MIO-16E-10, and AT-MIO-16DE-10 have a unipolar inputrange of 10 V (0 to 10 V) and a bipolar input range of 10 V (±5 V).Table 3-1. Available Input Configurations for the AT E SeriesConfiguration DescriptionDIFF A channel configured in DIFF mode uses two analogchannel input lines. One line connects to the positiveinput of the board programmable gaininstrumentation amplifier (PGIA), and the otherconnects to the negative input of the PGIA.RSE A channel configured in RSE mode uses one analogchannel input line, which connects to the positiveinput of the PGIA. The negative input of the PGIAis internally tied to analog input ground (AIGND).NRSE A channel configured in NRSE mode uses oneanalog channel input line, which connects to thepositive input of the PGIA. The negative input of thePGIA connects to the analog input sense (AISENSE)input.
